The sublimation materials Unit

Sublimation materials lab photo.

The sublimation materials unit focuses on exploring silicon carbide semiconductors, graphene, other low-dimensional materials, and their energy and environmental applications.

Sublimation materials unit focuses on exploring silicon carbide semiconductors, graphene, other low-dimensional materials, and their energy and environmental applications.

Sublimation materials Unit lab photo.The group is internationally recognized with its expertise in sublimation growth of silicon carbide (SiC) and graphene growth on SiC substrates, particularly the cubic silicon carbide (3C-SiC) growth of bulk like material with high structural quality.

The unique sublimation growth equipment in Sweden is a strong prerequisite of further technological developments. In 2011 the spin off company Graphensic AB for production of high-quality, wafer-scale graphene on SiC substrates was launched.

The group also focuses on exploring graphene, 3C-SiC, and other materials for a direct conversion of solar energy into the renewable energy such as hydrogen and other chemical fuels based on photocatalytic and photoelectrochemical (PEC) water splitting and PEC CO2 reduction. It also aims to tailor material properties for novel sensing, catalysis, and optoelectronic applications.

Publications

2024

Hui Zeng, Weimin Wang, Ivan Gueorguiev Ivanov, Vanya Darakchieva, Jianwu Sun (2024) Determination of the conduction and valence band offsets at the Co3O4/3C-SiC p-n heterojunction Applied Physics Letters, Vol. 125, Article 162102 (Article in journal) Continue to DOI
Alyssa Mock, Steffen Richter, Alexis Papamichail, Vallery Stanishev, Misagh Ghezellou, Jawad Ul-Hassan, Andreas Popp, Saud Bin Anooz, Daniela Gogova-Petrova, Praneeth Ranga, Sriram Krishnamoorthy, Rafal Korlacki, Mathias Schubert, Vanya Darakchieva (2024) Effective uniaxial dielectric function tensor and optical phonons in (¯2⁢01)-oriented ��-Ga2⁢O3 films with equally distributed sixfold-rotation domains Physical Review Applied, Vol. 22, Article 044003 (Article in journal) Continue to DOI
Tommaso Del Rosso, Ivan I. Shtepliuk, Quaid Zaman, Luis Gonzalo Baldeon Huanqui, Fernando Lazaro Freire, Andre Nascimento Barbosa, Marcelo Eduardo Huguenin Maia da Costa, Ricardo Q. Aucelio, Jarol Ramon Miranda Andrades, Cesar D. Mendoza, Rajwali Khan, Giancarlo Margheri (2024) On the Strong Binding Affinity of Gold-Graphene Heterostructures with Heavy Metal Ions in Water: A Theoretical and Experimental Investigation Langmuir, Vol. 40, p. 20204-20218 (Article in journal) Continue to DOI
Alexis Papamichail, Axel Persson, S. Richter, Vallery Stanishev, Nerijus Armakavicius, Philipp Kuhne, S. Guo, Per O A Persson, Plamen Paskov, N. Rorsman, Vanya Darakchieva (2024) Impact of Al profile in high-Al content AlGaN/GaN HEMTs on the 2DEG properties Applied Physics Letters, Vol. 125, Article 123505 (Article in journal) Continue to DOI
Yuanju Qu, Valdas Jokubavicius, Duc Quang Hoang, Xianjie Liu, Mats Fahlman, Ivan Gueorguiev Ivanov, Rositsa Yakimova, Jianwu W. Sun (2024) Aging Ni(OH)2 on 3C-SiC Photoanodes to Achieve a High Photovoltage of 1.1 V and Enhanced Stability for Solar Water Splitting in Strongly Alkaline Solutions ACS Applied Materials and Interfaces, Vol. 16, p. 50926-50936 (Article in journal) Continue to DOI
Nerijus Armakavicius, Philipp Kuhne, Alexis Papamichail, Hengfang Zhang, Sean Robert Knight, Axel Persson, Vallery Stanishev, Jr-Tai Chen, Plamen Paskov, Mathias Schubert, Vanya Darakchieva (2024) Electronic Properties of Group-III Nitride Semiconductors and Device Structures Probed by THz Optical Hall Effect Materials, Vol. 17, Article 3343 (Article in journal) Continue to DOI
Septia Kholimatussadiah, Chia-Ling Hsu, Shang -Wei Ke, Tsu-Chin Chou, Yung-Fu Wu, Rositsa Yakimova, Akichika Kumatani, Kuei-Hsien Chen, Li-Chyong Chen, He-Yun Du (2024) In-situ observation of hydrogen nanobubbles formation on graphene surface by AFM-SECM Electrochimica Acta, Vol. 493, Article 144425 (Article in journal) Continue to DOI
Hui Zeng, Jui-Che Chang, Yuanju Qu, Weimin Wang, Jens Birch, Ching-Lien Hsiao, Jianwu Sun (2024) Interface-Engineered InAlN/Cu2O Photocathode with Accelerated Charge Separation for Boosting Photoelectrochemical Water Splitting Solar RRL (Article in journal) Continue to DOI
Daniela Gogova-Petrova, Dat Tran, Vallery Stanishev, Valdas Jokubavicius, L. Vines, M. Schubert, Rositsa Yakimova, Plamen Paskov, Vanya Darakchieva (2024) High crystalline quality homoepitaxial Si-doped β-Ga2O3(010) layers with reduced structural anisotropy grown by hot-wall MOCVD Journal of Vacuum Science & Technology. A. Vacuum, Surfaces, and Films, Vol. 42, Article 022708 (Article in journal) Continue to DOI
Nerijus Armakavicius, Sean Robert Knight, Philipp Kuhne, Vallery Stanishev, Dat Tran, Steffen Richter, Alexis Papamichail, Megan Stokey, Preston Sorensen, Ufuk Kilic, Mathias Schubert, Plamen P. Paskov, Vanya Darakchieva (2024) Electron effective mass in GaN revisited: New insights from terahertz and mid-infrared optical Hall effect APL Materials, Vol. 12, Article 021114 (Article in journal) Continue to DOI

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